Method manufacturing medium density fiberboard by recycling rim charge

Abstract

The invention discloses a method manufacturing a medium density fiberboard by recycling rim charge, and relates to the technical field of chemical engineering. The manufacturing method comprises the following steps: (1) smashing board edges, wherein the diameters of smashed dust particles are 0.063 mm-1.0 mm; (2) accessing the processed wood chips into a defibrator, grinding the wood chips into fibers, and loading the fibers into a drying pipeline; adding auxiliary raw materials of an adhesive, paraffin and a curing agent during the process; (3) injecting the dust into the drying pipeline to uniformly mix with the fibers; adding 5% of the adhesive during the mixing process to obtain a mixture of which the dust content is 4.0-5.0%, wherein the inlet temperature of the drying pipeline is 150-190 DEG C, and the outlet temperature of the drying pipeline is 60-70 DEG C; (4) spreading and forming the mixture; conducting hot press to obtain boards; (5) saw-cutting the boards; obtaining qualified medium density fiberboards after sanding and edge cutting. The method can solve the problem that board edges produced during a conventional medium density fiberboard working process cannot be fully used.

Description

technical field

[0001] The invention relates to the technical field of medium-density fiberboard manufacturing, in particular to a method for manufacturing medium-density fiberboards by recycling the leftovers of the medium-density fiberboard and regenerated fibers. Background technique

[0002] Medium density fiberboard is a kind of man-made board that is made of wood or other plant fibers, and wood fibers are separated from wood through a special process, and then the wood fibers are bonded with an adhesive and pressed into shape. Before the final product of MDF is produced, the periphery of the fiberboard should be cut according to product specifications or process requirements. The edge of the cut board is relatively large. According to statistics, the edge of the board accounts for about 4.0%-5.0% of the total; and The trimmed edge of the board is sold as residual waste, and the current price is only about 650 yuan per ton, while the price of medium density fiberboard i...

Examples

Embodiment Construction

[0019] The present invention is described in further detail below with embodiment:

[0020] Recycling edge materials to manufacture medium density fiberboard, the production steps are as follows:

[0021] ⑴ Board edge crushing: Send the board edge cut in the original production to the crusher for crushing. The diameter of the crushed dust particles is 0.063mm ~ 1.000mm, and then the dust is transported to the dust bin for storage by a fan;

[0022] ⑵Put the treated wood chips into the thermal grinder to grind out the fibers and send them into the drying pipeline. During the process, 23% of adhesive, 0.5% of paraffin, and 1.5% of curing agent are applied;

[0023] (3) Drying: Spray the dust stored in the dust bin into the drying pipe with a high-pressure fan and mix it evenly with the fiber. During the mixing process, add 5% of the adhesive on the basis of the original adhesive, that is, apply 1.15% of the adhesive agent; the content of dust after mixing is 4.0-5.0%; the inlet...

technical field

[0001] The invention relates to the technical field of medium-density fiberboard manufacturing, in particular to a method for manufacturing medium-density fiberboards by recycling the leftovers of the medium-density fiberboard and regenerated fibers. Background technique

[0002] Medium density fiberboard is a kind of man-made board that is made of wood or other plant fibers, and wood fibers are separated from wood through a special process, and then the wood fibers are bonded with an adhesive and pressed into shape. Before the final product of MDF is produced, the periphery of the fiberboard should be cut according to product specifications or process requirements. The edge of the cut board is relatively large. According to statistics, the edge of the board accounts for about 4.0%-5.0% of the total; and The trimmed edge of the board is sold as residual waste, and the current price is only about 650 yuan per ton, while the price of medium density fiberboard i...

Examples

Embodiment Construction

[0019] The present invention is described in further detail below with embodiment:

[0020] Recycling edge materials to manufacture medium density fiberboard, the production steps are as follows:

[0021] ⑴ Board edge crushing: Send the board edge cut in the original production to the crusher for crushing. The diameter of the crushed dust particles is 0.063mm ~ 1.000mm, and then the dust is transported to the dust bin for storage by a fan;

[0022] ⑵Put the treated wood chips into the thermal grinder to grind out the fibers and send them into the drying pipeline. During the process, 23% of adhesive, 0.5% of paraffin, and 1.5% of curing agent are applied;

[0023] (3) Drying: Spray the dust stored in the dust bin into the drying pipe with a high-pressure fan and mix it evenly with the fiber. During the mixing process, add 5% of the adhesive on the basis of the original adhesive, that is, apply 1.15% of the adhesive agent; the content of dust after mixing is 4.0-5.0%; the inlet...

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